Germination and seed vigor of Gallesia integrifolia under saline stress

• Autor(a) principal: Lopes, José Carlos
• Data de Publicação: 2015
• Outros Autores: Freitas, Allan Rocha de, Beltrame, Rômulo André, Venancio, Luan Peroni, Manhone, Pedro Ramon, Silva, Fernanda Rodrigues Nunes e
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Florestal Brasileira (Online)
• Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/631
• topic: Initial development; Salinity; Exogenous antioxidants; Gallesia integrifolia; Desenvolvimento inicial; Salinidade; Antioxidantes exógenos

Soil salinity is a major abiotic stress factor, adversely affecting many aspects of plants physiology and biochemistry. This study aimed to evaluate the effect of preconditioning seeds of Gallesia integrifolia with potassium nitrate (KNO3) and sodium nitroprussiate (SNP) under saline stress. Seeds were treated through the preconditioning immersion in solutions with five concentrations of KNO3 (0, 0.01, 0.1, 1 and 10 mg L-1) and of SNP (0, 0 01, 0.1, 1 and 10 mg L-1) for one hour. Then, they were distributed in previously moistened filter paper sheets with saline solutions in three osmotic potentials (0, -0.6 and -1.2 MPa). The paper rolls were kept in germination chamber type BOD under alternating temperature of 20-30 °C with photoperiod of 8/16 h for 22 days. It was observed that lower osmotic potential resulted in reduction for all variables average. The osmotic potential of -1.2 MPa influenced negatively the germination and vigor of G. integrifolia. KNO3 and SNP at concentration of 1 mg L-1 reduces the saline effect in seeds.